Passing a parameter to componentUrl loginscreen

trying to pass a parameter to a component url using loginScreen. I cannot access this parameter in the page.
tried a few ways i read in the forums here, but all coming up undefined. Any suggestions?

//loginScreen = popup component url
path: ‘/profile/create/:u_id’,
loginScreen: {
componentUrl: ‘./pages/profile/create.html’,
}, Check passRouteParamsToRequest parameter